OMG help with science!!!!?

OK so i have this science crossword and theres a couple questions i just cant figure out!!





1.A region that is isolated from its surroundings and can not transfer matter or energy across.(2 words 12 letters)


2.The fundamental principle of physics that the total energy of an isolated system is constant despite internal changes.(3 words 20 letters)


3.The process of energy changing from one form to another(2 words 19 letters)


4.All conditions must be identical except the variable being tested, which means everything else is controlled except for the variable being tested.(2 words 8 letters)


5.A statement that expresses a fundamental principle of science.(2 words 13 letters)





if you can help pleasseeeee write it|||1. "Isolated System" but this is 14 letters. A "Closed" System is 12 letters but whereas matter cannot be transferred across a closed system, energy can!


http://74.125.153.132/search?q=cache:egQ鈥?/a>


2. Conservation of Energy


http://www.thefreedictionary.com/conserv鈥?/a>


3 Energy Conversion (but only 16 letters). How about Conversion Processes (19 letters)


5. Scientific Law


http://en.wikipedia.org/wiki/Scientific_鈥?/a>